Instruction manual

FEATURES AND SERVICES
Call Accounting System (CAS)
Description
Call Accounting is the collecting, processing, and use of information about all trunk calls
placed from and received by System 25. It is intended to help customers control telephone
use and manage associated costs.
Detailed call data is available at Interface Port 2 of the Digital Switch’s CPU/MEM Circuit
Pack. This data can be fed to a Call Accounting System (CAS) for preparing a variety of cost
estimate reports and for providing management and directory type services. For additional
information on the call data available at Interface Port 2, refer to the Station Message Detail
Recording (SMDR) feature description.
Three station features of System 25 are also related to Call Accounting and are covered in
separate feature descriptions.
Account Code Entry, both Forced and Optional, allows
individual voice terminal users to associate specific account codes with their calls, when
necessary. Call Accountability provides users with the means to properly identify calls they
make from stations other than their own. The information gathered from these two features
is part of the data output from the processor to the CAS.
Two types of CASs can be used with System 25:
● CAS Model 200, 300, 500, or 2000 Software Package associated with an AT&T
Personal Computer (PC) 6300.
● CAS Model 200, 300, 500, or 2000 Software Package associated with a Master
Controller (UNIX PC).
CAS Models 200, 300, 500, and 2000:
The System 25 SMDR interface provides direct output to the CAS software running on either
an AT&T Personal Computer equipped with MS-DOS (V2.11 or later) or a UNIX PC Master
Controller. CAS calculates the cost of calls and provides basic and sophisticated call reports.
After a telephone call is completed, System 25 sends a call record to the AT&T Personal
Computer via the SMDR interface channel. The PC must be equipped with and running CAS
software. Call records are collected by the PC and held in a buffer until they are processed.
When a call record is processed, a cost is calculated and assigned to it. That cost, along
with other call record information, is then stored on a hard disk for subsequent retrieval.
Two modes of operation are available for PC operation:
● Dedicated Mode: The PC is dedicated to one and only one task—processing call
records.
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